◎ 题干
—Dad, when shall we go to visit my grandpa?
—Grandpa is very busy at present.We'll go to see him whenever __________.
A.he is convenientB.he will be convenient
C.it is convenient to himD.it will be convenient to him
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Dad, when shall we go to visit my grandpa?—Grandpa is very busy at present.We'll go to see him whenever __________.A.he is convenientB.he will be convenient …”主要考查了你对  【therebe句型】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。